When I posted the thread on the extra barrel I have, I gotr to looking at my 2 sweet sixteens. I have one (SN-X374XX) that has the safety forward of the trigger (back to front push). I have another one (the SN's have been removed) that has the safety behind the trigger (left to right push). The guns have been in my family all of my life. Anyone know as to the age and significance of these guns. I love them and have dropped many dove with them. Value?